They're not anime-style I believe (I don't find Eternum anime style? xD), but I liked Acting Lessons and Being a Dik from Dr. PinkCake a lot, in case you don't mind they cattering to some heavy topics (more for AL, BaD!k is more chill), the second is still underway.
Now & Then from ILSProductions is also quite cool with a good story, I liked the flow of it a lot despite the main romance at the start being girls who just turned 18 x.x In case you're not into that, some older women more in line with the MC age appear throughout the story as romance interests as well